High-pressure jet grouting pile hole leading construction integrated device and construction method thereof

Abstract

The invention relates to a high-pressure jet grouting pile hole leading construction integrated device and a construction method thereof. The high-pressure jet grouting pile hole leading constructionintegrated device comprises a jet grouting drilling machine, a high-pressure jet grouting drill rod and a triple pipe, wherein the triple pipe is fixedly arranged at the bottom of the high-pressure jet grouting drill rod, and a down-the-hole hammer is fixedly arranged at the bottom of the triple pipe; and the triple pipe comprises a grout outlet ejector, an inner air outlet ejector and an outer air outlet ejector which are sequentially arranged from inside to outside. The high-pressure jet grouting pile hole leading construction integrated device is simple in structure, convenient to use and practical, the construction technology of combining the triple pipe and the down-the-hole hammer is adopted for the environment of a complex geological layer, and by optimizing construction technical parameters, an obtained pile body is high in strength and good in construction quality. Compared with a traditional high-pressure jet grouting pile construction method, the input mechanical materials are few, the cost is low, construction is safe, and construction is rapid.

Description

technical field [0001] The invention belongs to the technical field of building construction, and in particular relates to an integrated device for leading hole construction of high-pressure rotary grouting piles and a construction method thereof. Background technique [0002] With the development of urban underground space, the requirements for the effect of water-stop curtains are getting higher and higher during the construction of deep foundation pits. The rotary grouting pile is to use the drilling rig to drill the rotary grouting pipe and nozzle at the design elevation of the pile bottom, pass the pre-prepared grout through the high-pressure generating device to make the liquid flow obtain huge energy, and spray it from the nozzle near the grouting pipe at high speed It will form a liquid flow with highly concentrated energy, which will directly destroy the soil. During the spraying process, the drill pipe will be lifted while rotating, so that the slurry and the soil ...

AI Technical Summary

Problems solved by technology

However, this patent uses a double pipe and a down-the-hole impactor. The high-pressure water and high-pressure cement slurry are not sprayed separately. The high-pressure water and high-pressure cement slurry share the same nozzle. The secondary cutting effect on the soil is weakened, the diameter of the pile is too small, and the effect of the pile is poor

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